Luna to me seems a bit masculine for some reason. I don't know, maybe she just looks harder. (and no I don't mean that as a phallic reference so go away). It's not a criticism either, I think it's quite fitting considering they are meant to be polar opposites. Well done!!

I've made a bigger version of this picture (res. 1920x1200). Just increased the size by setting this picture in the middle of a bigger clear one and drawing a raw extension. Would it be ok to upload it and refer to your picture? Because you have sadly no desktop size here.